Composition of bioclastic sands, carbonates and pyroclastic rocks of the Great Meteor and Josephine Seamounts, eastern North Atlantic
1. Great Meteor Seamount (GMS) is a very large (24,000 km**3) guyot with a flat summit plateau at 330-275 m; it has a volcanic core, capped by 150-600 m of post-Middle-Miocene carbonate and pyroclastic rocks, and is covered by bioclastic sands. The much smaller Josephine Seamount (JS, summit 170- 50...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.548422 2023-05-15T17:37:16+02:00 Composition of bioclastic sands, carbonates and pyroclastic rocks of the Great Meteor and Josephine Seamounts, eastern North Atlantic von Rad, Ulrich MEDIAN LATITUDE: 33.221939 * MEDIAN LONGITUDE: -21.779337 * SOUTH-BOUND LATITUDE: 29.700000 * WEST-BOUND LONGITUDE: -29.258333 * NORTH-BOUND LATITUDE: 36.988300 * EAST-BOUND LONGITUDE: -14.200000 * DATE/TIME START: 1967-06-26T16:06:00 * DATE/TIME END: 1970-03-12T13:27:00 1974-11-14 application/zip, 3 datasets https://doi.pangaea.de/10.1594/PANGAEA.548422 https://doi.org/10.1594/PANGAEA.548422 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.548422 https://doi.org/10.1594/PANGAEA.548422 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: von Rad, Ulrich (1974): Great Meteor and Josephine Seamounts (eastern North Atlantic): Composition and origin of bioclastic sands, carbonate and pyroclastic rocks. Meteor Forschungsergebnisse, Deutsche Forschungsgemeinschaft, Reihe C Geologie und Geophysik, Gebrüder Bornträger, Berlin, Stuttgart, C19, 1-61 Atlantische Kuppenfahrten 1967/4-7 BC BCR Box corer Box corer (Reineck) Cape Blanc/Meteor Bank/Portugal Dredge DRG Grab M19 M19_128 M19_133 M19_134 M19_136 M19_137 M19_140 M19_141 M19_145 M19_156 M19_158 M19_163 M19_211 M19_215-2 M19_217-2 M9 M9_101 M9_101a M9_101b M9_103a M9_110 M9_117 M9_118 M9_119 M9_121 M9_122 M9_123 M9_124 M9_125 M9_127 M9_128 M9_129 M9_129a M9_130 M9_131 M9_131a M9_132 M9_133 M9_133a M9_147a Dataset 1974 ftpangaea https://doi.org/10.1594/PANGAEA.548422 2023-01-20T07:31:00Z 1. Great Meteor Seamount (GMS) is a very large (24,000 km**3) guyot with a flat summit plateau at 330-275 m; it has a volcanic core, capped by 150-600 m of post-Middle-Miocene carbonate and pyroclastic rocks, and is covered by bioclastic sands. The much smaller Josephine Seamount (JS, summit 170- 500 m w. d.) consists mainly of basalt which is only locally covered by limestones and bioclastic sands. 2. The bioclastic sands are almost free of terrigenous components, and are well sorted, unimodal medium sands. (1) "Recent pelagic sands" are typical of water depths > 600 m (JS) or > 1000 m (GMS). (2) "Sands of mixed relict-recent origin" (10-40% relict) and (3) "relict sands" (> 40% relict) are highly reworked, coarse lag deposits from the upper flanks and summit tops in which recent constituents are mixed with Pleistocene or older relict material. 3. From the carbonate rocks of both seamounts, 12 "microfacies" (MF-)types were distinguished. The 4 major types are: (1) Bio(pel)sparites (MF 1) occur on the summit plateaus and consist of magnesian calcite cementing small pellets and either redeposited planktonic bioclasts or mixed benthonic-planktonic skeletal debris (2) Porous biomicrites (MF 2) are typical of the marginal parts of the summit plateaus and contain mostly planktonic foraminifera (and pteropods), sometimes with redeposited bioclasts and/or coated grains; (3) Dense, ferruginous coralline-algal biomicrudites with Amphistegina sp. (MF 3.1), or with tuffaceous components (MF 3.2); (4) Dense, pelagic foraminiferal nannomicrite (MF 4) with scattered siderite rhombs. Corresponding to the proportion and mineralogical composition of the bioclasts and of the (Mgcalcitic) peloids, micrite, and cement, magnesian calcite (13-17 mol-% MgCO3) is much more abundant than low-Mg calcite and aragonite in rock types (1) and (2). Type (3) contains an "intermediate" Mg-calcite (7-9 mol-X), possibly due to an original Mg deficiency or to partial exsolution of Mg during diagenesis. The nannomicrite (4) consists of ... Dataset North Atlantic Planktonic foraminifera PANGAEA - Data Publisher for Earth & Environmental Science Josephine ENVELOPE(-152.800,-152.800,-77.550,-77.550) Meteor Bank ENVELOPE(8.500,8.500,-48.000,-48.000) Meteor Seamount ENVELOPE(8.500,8.500,-48.000,-48.000) ENVELOPE(-29.258333,-14.200000,36.988300,29.700000) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
Atlantische Kuppenfahrten 1967/4-7 BC BCR Box corer Box corer (Reineck) Cape Blanc/Meteor Bank/Portugal Dredge DRG Grab M19 M19_128 M19_133 M19_134 M19_136 M19_137 M19_140 M19_141 M19_145 M19_156 M19_158 M19_163 M19_211 M19_215-2 M19_217-2 M9 M9_101 M9_101a M9_101b M9_103a M9_110 M9_117 M9_118 M9_119 M9_121 M9_122 M9_123 M9_124 M9_125 M9_127 M9_128 M9_129 M9_129a M9_130 M9_131 M9_131a M9_132 M9_133 M9_133a M9_147a |
spellingShingle |
Atlantische Kuppenfahrten 1967/4-7 BC BCR Box corer Box corer (Reineck) Cape Blanc/Meteor Bank/Portugal Dredge DRG Grab M19 M19_128 M19_133 M19_134 M19_136 M19_137 M19_140 M19_141 M19_145 M19_156 M19_158 M19_163 M19_211 M19_215-2 M19_217-2 M9 M9_101 M9_101a M9_101b M9_103a M9_110 M9_117 M9_118 M9_119 M9_121 M9_122 M9_123 M9_124 M9_125 M9_127 M9_128 M9_129 M9_129a M9_130 M9_131 M9_131a M9_132 M9_133 M9_133a M9_147a von Rad, Ulrich Composition of bioclastic sands, carbonates and pyroclastic rocks of the Great Meteor and Josephine Seamounts, eastern North Atlantic |
topic_facet |
Atlantische Kuppenfahrten 1967/4-7 BC BCR Box corer Box corer (Reineck) Cape Blanc/Meteor Bank/Portugal Dredge DRG Grab M19 M19_128 M19_133 M19_134 M19_136 M19_137 M19_140 M19_141 M19_145 M19_156 M19_158 M19_163 M19_211 M19_215-2 M19_217-2 M9 M9_101 M9_101a M9_101b M9_103a M9_110 M9_117 M9_118 M9_119 M9_121 M9_122 M9_123 M9_124 M9_125 M9_127 M9_128 M9_129 M9_129a M9_130 M9_131 M9_131a M9_132 M9_133 M9_133a M9_147a |
description |
1. Great Meteor Seamount (GMS) is a very large (24,000 km**3) guyot with a flat summit plateau at 330-275 m; it has a volcanic core, capped by 150-600 m of post-Middle-Miocene carbonate and pyroclastic rocks, and is covered by bioclastic sands. The much smaller Josephine Seamount (JS, summit 170- 500 m w. d.) consists mainly of basalt which is only locally covered by limestones and bioclastic sands. 2. The bioclastic sands are almost free of terrigenous components, and are well sorted, unimodal medium sands. (1) "Recent pelagic sands" are typical of water depths > 600 m (JS) or > 1000 m (GMS). (2) "Sands of mixed relict-recent origin" (10-40% relict) and (3) "relict sands" (> 40% relict) are highly reworked, coarse lag deposits from the upper flanks and summit tops in which recent constituents are mixed with Pleistocene or older relict material. 3. From the carbonate rocks of both seamounts, 12 "microfacies" (MF-)types were distinguished. The 4 major types are: (1) Bio(pel)sparites (MF 1) occur on the summit plateaus and consist of magnesian calcite cementing small pellets and either redeposited planktonic bioclasts or mixed benthonic-planktonic skeletal debris (2) Porous biomicrites (MF 2) are typical of the marginal parts of the summit plateaus and contain mostly planktonic foraminifera (and pteropods), sometimes with redeposited bioclasts and/or coated grains; (3) Dense, ferruginous coralline-algal biomicrudites with Amphistegina sp. (MF 3.1), or with tuffaceous components (MF 3.2); (4) Dense, pelagic foraminiferal nannomicrite (MF 4) with scattered siderite rhombs. Corresponding to the proportion and mineralogical composition of the bioclasts and of the (Mgcalcitic) peloids, micrite, and cement, magnesian calcite (13-17 mol-% MgCO3) is much more abundant than low-Mg calcite and aragonite in rock types (1) and (2). Type (3) contains an "intermediate" Mg-calcite (7-9 mol-X), possibly due to an original Mg deficiency or to partial exsolution of Mg during diagenesis. The nannomicrite (4) consists of ... |
format |
Dataset |
author |
von Rad, Ulrich |
author_facet |
von Rad, Ulrich |
author_sort |
von Rad, Ulrich |
title |
Composition of bioclastic sands, carbonates and pyroclastic rocks of the Great Meteor and Josephine Seamounts, eastern North Atlantic |
title_short |
Composition of bioclastic sands, carbonates and pyroclastic rocks of the Great Meteor and Josephine Seamounts, eastern North Atlantic |
title_full |
Composition of bioclastic sands, carbonates and pyroclastic rocks of the Great Meteor and Josephine Seamounts, eastern North Atlantic |
title_fullStr |
Composition of bioclastic sands, carbonates and pyroclastic rocks of the Great Meteor and Josephine Seamounts, eastern North Atlantic |
title_full_unstemmed |
Composition of bioclastic sands, carbonates and pyroclastic rocks of the Great Meteor and Josephine Seamounts, eastern North Atlantic |
title_sort |
composition of bioclastic sands, carbonates and pyroclastic rocks of the great meteor and josephine seamounts, eastern north atlantic |
publisher |
PANGAEA |
publishDate |
1974 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.548422 https://doi.org/10.1594/PANGAEA.548422 |
op_coverage |
MEDIAN LATITUDE: 33.221939 * MEDIAN LONGITUDE: -21.779337 * SOUTH-BOUND LATITUDE: 29.700000 * WEST-BOUND LONGITUDE: -29.258333 * NORTH-BOUND LATITUDE: 36.988300 * EAST-BOUND LONGITUDE: -14.200000 * DATE/TIME START: 1967-06-26T16:06:00 * DATE/TIME END: 1970-03-12T13:27:00 |
long_lat |
ENVELOPE(-152.800,-152.800,-77.550,-77.550) ENVELOPE(8.500,8.500,-48.000,-48.000) ENVELOPE(8.500,8.500,-48.000,-48.000) ENVELOPE(-29.258333,-14.200000,36.988300,29.700000) |
geographic |
Josephine Meteor Bank Meteor Seamount |
geographic_facet |
Josephine Meteor Bank Meteor Seamount |
genre |
North Atlantic Planktonic foraminifera |
genre_facet |
North Atlantic Planktonic foraminifera |
op_source |
Supplement to: von Rad, Ulrich (1974): Great Meteor and Josephine Seamounts (eastern North Atlantic): Composition and origin of bioclastic sands, carbonate and pyroclastic rocks. Meteor Forschungsergebnisse, Deutsche Forschungsgemeinschaft, Reihe C Geologie und Geophysik, Gebrüder Bornträger, Berlin, Stuttgart, C19, 1-61 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.548422 https://doi.org/10.1594/PANGAEA.548422 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/PANGAEA.548422 |
_version_ |
1766137079757012992 |